Accessible Web Design: Five Big Ideas

Make sure you can navigate and operate your page with the keyboard alone.

Include clear and concise ALT
attributes for all relevant images and graphics appearing in your site. "Comment
out" (for the screen reader) strictly decorative graphics with alt =
"". Use a testing tool to view images replaced with their alt text.WebAIM: Images

Tables
Data - Use row and column headers to help identify cell contents. In data
tables that are nested use the "id" attribute to clarify cell titles.
Layout - How a table content "looks" and how it "reads"
can be two different things. Use a tool to linearize your table to make sure
it still makes sense. This is the order that a screen reader will read it.WebAIM: Tables

Forms
Use "label" and "fieldset" attributes.
Submit via a "button" rather than an automatic script.WebAIM: Forms